Questions & Answers about Bu cadde çok işlek.
Why is there no verb like to be in Bu cadde çok işlek?
What is the role of çok in the sentence?
What does bu mean here, and can I use şu or o instead?
bu is a proximal demonstrative meaning this (near the speaker). You can replace it with şu (that, near the listener) or o (that over there) depending on context. If you drop the demonstrative entirely, you get Cadde çok işlek, which is a more general statement: “The street is very busy.”